Pimentel was by far the highest-profile international signing of the Mariners in 2009. He was considered by some to be the most advanced hitter of all international prospects. After two seasons in rookie ball, Pimentel has really only shown that he’s got a long ways to go before he major league ready. The power seems to be there, He’s hit 17 home runs and posted a .181 ISO in 458 plate appearances. There is still a lot of promise in Pimentel’s bat, but there is some worry that he won’t be able to stick in the outfield. Pimentel may have the most potential in his bat of any prospect in the farm system, but he’s certainly a volatile prospect.